Firearm



.H. D. ALLYN FIREARM July 19, 14960v 4 Sheets-Sheet 1 maar' June 19, 195e IN VEN TOR.

vMz/@ BY fnv/WM H. D. ALLYN FIREARM .hay 19,.. 1960 4 Sheets-Shes?l 2 Filed June 19, 1956 l l INVENTOIL l we@ July 19, 1960 A H. D. ALLYN FIREARM 4 Sheets-Sheet 3 Filed June 19, 1956 INVENTOR.

July 19, 1960 H.V D. ALLYN FIREARM 4 Sheets-Sheet 4 Filed Ju ne 19, 1956 Harold D. Allyn, Sumner Ave., Springfield, Mass. Filed June 1.9-, 1956, Ser. No. 592,430 -4 Claims. (Cl. 89-154) My invention relates to new and useful improvements in a firearm of the automatic, semi-automatic or hand- `operated type and is directed more specifically toanV improved combination hammer and` trigger action which in addition to the normal functions thereof serves with other related components as a buffer means at the termina'tion of the .rearward or opening stroke of the re-V ciprocating components, said means offering a capacity for absorbing wholly or partially the shockor blow connected with the abrupt sto'pping of the said reciprocating components `at said stroke termination.

N United States Patclflt It is a principal object of my invention to provide means by which the laforesaid buer action may be .accomplishedby and during the cooking of theharnmer component.

It is another object hereof to provide a novel combination of components including a hammer and scar and their associated spring members, the hammer and sear being supported by means ofra slide block to permit their reciprocation with said breech 'bolt during the operation of the` firearm. Y t i The butler action o'f the firearm of this invention .is `accon'tplished without the usual addition of a multiplicity of component parts familiar in 'firearms of the type herein contemplated.

One additional purpose of my invention is to'provide structuraland operational improvements in mechanisms of the class to which` reference has been made, which vimprovements simplify the structure as such and provide important distinct advantages in durability, efficiency and the like. A

The mechanism hereof is practical in its value, reliable in its operation, efficient` in its use, and effective for the purpose for which designed, and it offers a mecha nisin which is constructed of relatively simple parts, which parts are adapted to be readily assembled and, when. once assembled, are positively and securely re tained in smooth and accurate operative relationship.

The concept of the firearm of this invention has been made with attendant manufacturing problems fully in mind and with special regard to the possibility of cheaply producing many of the component parts from riveted -or welded stampings, or screw machine parts, or from fabrications made by like systems of low cost manufacture, liberal tolerances being permitted practically 'throughout the structure so asA to aid in the economics ofproduction. Y Y

Although the components as shown herein are contemplated as stampings which may be riveted and/or welded, same is notl necessarily so within the spirit and scope of the invention.k The components may be other wise machined as from solidstock, and certain compo nents, as for example the bufferV plate, may be made integral withl other components, as for` example the receiver, or trigger housing.

Further objects and advantages of the invention will become apparent as the following description proceeds, l

and the features of novelty which characterize the invent 'Patented July `19,1960

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2 y .tion will be pointed dut with )particularity .in the claims a-nexed to and .forming part of `this specification.

It is to be appreciated initially that `the utilityA and application of the mechanism hereof -arernot limited to anyV specific type `of weapon or firearm and comprehend useful and novel features here -set forth when in'co'rporated in any reasonably appropriate type of firearm. That is, the invention basically envisions certain new fundamental principles of design, which principles can be applied to any reasonably appropriate type of firearm.

The single example of a physical embodiment ofthe )invention herein Arecited is to -be considered i'n all respects merely as being illustrative and not as being restrictive. rAll modifications andvariations as reasonably .fall within the meaning and purview and range 'of equivalency of the disclosure and claims hereof are 4therefore intended to be embraced herein. t

The hammer, hammer spring, Sear, and sear spring, being mounted on the slide block, instead `of being mounted in a guard gro'up, as is usual, and reciprocating therewith, offer additional weight to the slide blockactionv bar assembly, and in the case of a .gas operated firearm, help to maintain a .more favorable weight'ratio between the operating shaft or rod and the breech block.

These and other objects and novel .features ofthe 1invention will be more clearly and fully set forth in 'the following specification and claims and will become more apparent from a study of the following description in connection with the attached drawings wherein:V

Fig. l is a broken longitudinal sectional view of #a firearm showing the mechanism y'off the invention in the Lcocked or readytolire position, 'only so 'much of the .firearm being shown asis 'necmsa'ry for 'an understanding of the present invention;

Fig. 2` is a longitudinal sectional view showing the mechanism illustrated inPig'. 1 the discharged Vposi tion, withother `components of the firearm being omitted for purposes of simplification;

Fig. 3 is a longitudinal sectional view, similar to Fig. 2, showing the reciprocating parts Ymoved rearwardly with the tail ofthe hammer in contact with the butter plate; the safety/trigger/eonnector spring being shown 'in broken view for clarity;

Fig. 4 .is a longitudinal sectional view., similar 'to Fig. 3, showing the hammer and 'relate-d components at the extremerear end of the rearward or opening stroke;

Fig. 5 is a longitudinal `sectiona'tl view, similarV to Fig. 3V, showing the tail of the hammer' riding over the ramp of the connector during 'the forward or clos-ing stroke 'of n'the mechanism;

Eig. 6 `is a longitudinal sectional view, similar to Fig. 3, showing the'mechanism in its most extreme forward position with the hammer in the cocked position and the trigger in its rearmost position; Y

- Fig. 7 is a side elevationalview ofjthehammer'of the mechanism to` better illustrate the` configuration thereof;

Fig. 8 is a more or less diagrammatic plan View of the connector and Ycertain appear in Fig. 1;

Fig. 9 is an enlarged partial side elevational view of the upper portion of the safety of the invention; t FFL-g1; 10 is a sectional view on the une 10-.1'0 or 1g. l Y

Fig. 11 is a broken side elevational view of certain of the components ofthe mechanism shown in Fig. 1, showing thesafety' in the 0N position and the safetya'rig ger/connector spring in the rear dete'nt notch of the safety;

Fig. 12 is a perspective view of the safety/ trigger/'con'- nector spring of the invention; and j Fig. 13 is a sectionalplan View through the safety pivot pin of the invention.

associated parts, as same In the following description and claims, various details will be identi-lied by specific names for convenience, which names are intended to be as generic in their application as the art will permit. t

'Referring now to the drawings more in detail, in which similar characters of reference indicate corresponding parts in the several figures, and referring more particularly to the form of my invention selected for illustrative purposes, I have shown in Fig. l the general outline of the midsection of a firearm including astock 10, a receiver 12, a breech mechanism 14, a firing pin 16, a slide block 18, and spaced action bars 20, all of which may be of conventional design and function and may be associated with each other in any of the usual and well known manners.

The breech bolt is reciprocal relative to and within the receiver, as .is conventional.

The tiring pin is extendable through a longitudinal bore in the breech bolt for reciprocating movements therein between a forward iired position and a rearward retired position, also as is well known.

The slide block includes a pair of spaced upwardly extending cam portions on the upper surface thereof which contact mating cam surfaces in the breech bolt so as to force same downwardly and move it out of its closed position in the receiver to unlock the firearm. Same does not form a part of this invention.

The mechanism of the invention generally incorporates the fire control elements of the firearm and will iirst be described with particular reference to Fig. l. In said figure, the components are shown in their relative positions ready to be fired wherein the hammer is cocked, the trigger is in its most forward position ready to be manually actuated rearwardly to effect discharge, and the safety is held in its Olli position.

The hammer 30 is an irregular shaped member, more or less as shown, has a front face 32 functioning as the striking surface thereof, and is pivotally mounted on a hammer pivot pin 34 extending laterally through and supported by the slide block 18.

The hammer 30 is held under the tension of and actuated by a generally U-shaped hammer spring 36 of the mousetrap or torsion type. The spring is looped around the hammer pivot pin 34 on both sides of the hammer 30.

The spaced opposite lower free ends of the hammer spring may be bent outwardly and bear upwardly against the bottom of the slide block 18, as shown, and a transversely extending mid-section of the hammer spring bears upwardly against the rearmost face of the hammer 30, also as shown, all to the end that the upper portion of the hammer is swung upwardly and forwardly to fall upon the firing pin when the hammer is released.

A sear 38 is pivotally mounted on a sear pin 40 which extends laterally through the slide block and functions to hold the hammer in the cocked position, as shown in Fig. 1, and to prevent the swing or throw thereof until released by the actuation of the trigger, as will shortly appear.

The sear 38 is provided with an uppermost hammer engaging point 42 which engages a complemental and mating Sear engaging notch 44 in the hammer, which features may be best observed by reference to Fig. 2, specific reference thereto not being made in Fig. 1 for purposes of clarity.

In the position shown in Fig. l, the hammer 30 is held relative to the sear 38 through the hammer engaging point 42 engaging the sear engaging notch 44 by virtue of the tension exerted by a sear spring 46 which nests in van appropriately aligned opening in the slide block, as

shown, and exerts a normally downward or outward pressure against the sear.

The trigger 54) is an iregularly shaped member having a lowermost nger gripping portion of conventional configuration and an upwardly extending bifurcated portion extending vertically upwardly therefrom. The bifurcated portion comprises a pair of offset vertically extending parallel ears 52 upwardly of shoulders 54 at the points of offset, all as may best be appreciated and understood by reference to Fig. 10.

A trigger housing is shown in Fig. 11 and includes a pair of transversely spaced vertically extending side walls 56. Said walls have forward and rearward end edges slightly inturned as shown in Fig. 8 and are connected by a transverse, horizontally extending, bottom wall 62 which may be of double thickness at opposite ends, as shown, in order to provide suicient thickness so that openings therethrough may be appropriately threaded whereby a screw means such as 64, Fig. l, may be engaged therewith all to the end that the trigger housing may be secured to other components of the iirearm, such as the upper wall of a guard 68. A lower trigger guard 69 of conventional conguration is also provided which passes around the lower linger engaging extremity of the trigger 50 for the obvious and well known security reasons. A

The upper portions of the trigger 50 extend upwardly through an elongated slot in the bottom wall 62 of the trigger housing in a manner whereby each ear 52 of the trigger is disposed adjacent one of the side walls 56 of the trigger housing, as shown in Fig. 10.

The triggerrS is pivotally mounted on and relative to the trigger housing by means of a pair of trigger pivot pins 70 of any desired form, each trigger pin being engageable with and extending through appropriately aligned openings in an ear 52 of the trigger and its adjacent side wall 56 of the trigger housing.

A U shaped elongated connector generally designated by the numeral 71 has spaced parallel upwardly extending side walls 72 connected by a lower, horizontally disposed, bottom Wall 74. Its rear end portion is snugly receivable between the spaced ears of the trigger in a position spaced above and distantly from the shoulders 54.

The rear end portion of the connector is provided with a downwardly depending lug portion 76 having a laterally disposed right angular slot 78 extending therethrough, as shown.

The upper face of the lug portion 76 is provided with an inclining-declining connector ramp or cam surface 80.

A connector pin 82 extends transversely through spaced, appropriately ahgned, transverse openings in the trigger, being snugly receivable therein, see Fig. 10. The opposite ends of the pin abut the walls of the trigger housing which function to hold the pin in place. The mid-section of the pin is movably disposed within the slot 78 of the connector.

As shown in Fig. l, the pin 82 is disposed in the lowermost area of the vertically extending portion of the slot 78.

The connector is movable rearwardly from what will be referred to as the upper and forward position of Fig. 1 by means of the connector pin 82 which is so related to the trigger as to be movable rearwardly therewith as the trigger is manually actuated rearwardly, as will hereinafter appear.

A generally U-shaped unitary safety/trigger/connector spring is provided, as best shown in Fig. l2, and includes a pair of spaced side portions which are disposed adjacent opposite outer sides of the trigger housing and a transverse midsection at the forward end 92 thereof.

Said side portions 90 have loops 94 intermediate their ends which are engageable over the outer ends of the trigger pivot pins,

The transverse mid-section'92 is disposed beneath the connector where it serves to push upwardly ,and forwardly against a downwardly depending protrusion or lug 75 on the underside of the connector.

The rear end 96 of one side of the spring is in the form of a U having a forward free end receivable in a suitable opening of the trigger serving to hold the trigger normally under a forward tension and hence in the normally forward position.

The oppositerear end ofthe spring will `subsequently be described.

In the various figures, certain portions of the s'afety/ trigger/,connector spring are shown in full and other portlons thereof are shown in section, all for purposes of clarity( e The lower end or tail portionof the sear 38 abuts the in- Side surface of an upwardly extending front Wall portion 73 o f the connector which connects the opposite ,side walls 72 at the forward end of' the connector.

As the connector is pulled rearwardly, upon rearward movement of the trigger, the Sear is thus rotated clockwise and thesear spring 46 is compressed whereby the hammer engaging point of the sear is released from engagement with the sear engaging notch of the hammer so as to permit the hammer to fall against the ring pin and thus to discharge the firearm.

I n Fig, 2, the trigger is illustrated as having been Pulled, the hammer as being down, and the connector as being in its most rearward position.. A

Following discharge, the 'hammer :and related components including the action bars and slideblock may be manually or automatically actuated rearwardly by any of the `conventional manners.

As it is so rearwardly moved, the tail 100 of the hammerslides over the connector ramp 80. In this rearward movement, the tail may or may not contact the ramp depending upon the angle assumed by the hammer relative to the slide block on which it is pivotally mounted.

After passing over the ramp, the rear face ofthe tail abuts the -forward face 102 of an L-shaped buffer plate 10.4, as shown in Fig. 3, which buffer plate is secured to the stock by means of the rear trigger guard screw 106, or other means.

Continuing rearwardly, the hammer is actuated on its pivot `with the upper portion of the hammer being receivable between the spaced walls 108 of the slotted upper portion of the buffer plate. When the hammer is pivoted into the full cock position, against the tension `of the hammer spring, the sear point under the tension of the sear Spring moves into the scar notch in the hammer. The hammer is allowed a slight overtravel (see Fig. 4) to a position beyond the full cock position so as to make a `gap between the sear point and the sear notch before the rear` end of the slide blockabuts the buffer plate so as to bring the components to a full stop at the limit of the rearward stroke, whereupon the sear point slides fully into thesear notch of the hammer as the components are actuated forwardly slightly by the ltension of the hammer spring as the mechanism moves forwardly.

The cocking of the hammer against the hammer spring functions as a buffer and brings the hammer, breech bolt, and attached mechanism -to a slow stop, all to the end that jarring is prevented or minimized.

The desideratum is to have the hammer cock progressively harder against the increasing tension of the hammer springfrom the moment of the initiation of the cocking action, when the tail of the hammer abuts the forward face of the Vbuffer plate, to the moment of the termination of the cocking action when the sear point finally moves 4into the sear notch in the hammer.

The leverage necessary to cock the hammer is most favorable where the fulcrum is long, as when the hammer tail first hitsthe buffer plate. e The fulcrum thereafter shortens up so as to make the leverage less favorable. v

To increase the buffer effect, wherein the hammer cocks harder and the slow down or buffer action isaccordingly increased, the angle represented by Y maybe increased or decreased so as tomake it cock easier or harder. See Fig. 7. Y Y l The buifer action maybe varied, that is made harder or4k softer, according to the point of contact of theltail `with"the` forward face of the buffer plate.

The point of :contact is represented Vby c on the tail .and it may be located by changing the angle Y and/ ortho distance X, all as judicious experimentation may dictate.

Likewise, the forward face of the buffer plate may be appropriately altered so as to compensate for any modifications made in the dimensions of angle Y and distance X of the hammer tail, or the configuration of the hammer tail, all as experience and desire may direct.

The tail and/ or the buffer plate may thus: be so shaped that the leverage to cock the hammer becomes progressively unfavorable as the hammer continues to be cocked. The contact point on the tail may be made to change abruptly'to make cocking increasingly diicult as the hammer approaches the full cock position or may change after the scar point has engaged in the sear notch of the hammer and cocking made more difficult during overtravel, all to the end that the buffer action of the reciprocating mechanism may be accordingly increased or decreased to result in the bringing'of same to a softer or harder stop as desired.

` When the hammer, breech block and attached mechanism are moved forwardly by manual or automatic means, so as to load and close the firearm, the hammer under tension of the hammer spring pivots forwardly on the hammer pivot pin until the sear notch of the hammer contacts the Asear point of the sear, as shown in Fig. 5.

The hammer then remains in this full cockedposition during the remainder of its cycle.

With `further reference to Fig. 5, -it will be observed that as the hammer and the associated components move forwardly, the tail of the hammer rides on the ramp wherefor the connector is cammed downwardly against the upward and forward pressure of the safety/trigger/ connector spring at the forward end of said spring at its point of engagement with the connector.

The connector pin 82 is xed to the trigger and the connector moves forwardly when the ramp thereof is sufciently depressed so `as to free the connector pin from the vertical into the horizontal portion of the slot whereupon the safety/trigger/ connector spring is free to drive The connector is stopped -in its forward travel when` the forward face of the lug 76 abuts the lower transverse wall in the slot in the wall 62 of the trigger hou-sing.

At this time, the connector pin is about to contact or is in actual Contact Withrthe rearward end of the horizontal portion of the angular slot, as'shown in Fig. 6.

It is to be appreciated that the width of the horizontal portion of the angular slot 78 is somewhat greater than the diameter of the connector pin, all to the end that close tolerances between the horizontal center line of the trigger pivot pins and the center line of the connector pin need not be maintained, whereby economies in manufacturing costs of components are achieved.

Upon continued forward movement of the hammer and the attached components, the parts assume the positions shown in Fig. 6, wherein the breech bolt is closed, thehamrner is cocked, and the trigger is held back.

ltwill be here noted that, although the trigger is-in it rearward positiorn'the connector Vis in its most forward position. Y

When the trigger is released, pressure of the rear end 96 of the safety/trigger/connector spring Vforces the triggerV forwardly. l

The connector pin, held snugly in the trigger, moves forward with the Vtrigger along the horizontal portionof the angular slot until stopped 'by the front end of the slot.

As the connector is under upward as well as forward tension applied by the safety/trigger'/connectorspring, the rear of the connector pivots upwardly and the connector pin movesV into the lower portion of the slot.

The parts now assume the positions as shown in Fig. l with the hammer cocked, and thetriggerin the-forward 'position where it is again ready for the discharge of `the firearm.

If, after pulling the trigger, and letting the hammer fall, the trigger should be released prior to the opening of the action, the operation of the parts during reciprocation would be as above described except that the front face of the trigger would be in contact with the front end of the trigger slot in the trigger housing and there would be no appreciable longitudinal motion of the connector during opening or closing movement of the firearm.

In' addition to the above described functions, the safety/trigger/ connector spring has still other functions.

The left rear end 9S thereof is bent inwardly as shown in Fig. 12. Upward tension is provided thereat so-that this bent portion acts as a safety detent spring. The front detent notch 122 cut in the safety 120 holds the safety in an OFF position and the rear detent notch 124 communicating therewith holds the safety in the ON position as shown in Figs. 9 and l1.

The safety pivots Ion a safety pivot pin 126 which extends transversely through and is supported by the side walls of the trigger housing, as best shown in Fig. l3.

The trigger guard 69 is slotted at its rearward portion as shown so as to permit the safety to travel forwardly and rearwardly therethrough.

The safety mechanism prevents inadvertent trigger operation when the firearm is loaded and cocked. The safety is pivoted to the trigger housing rearwardly of and in alignment with the trigger and is movable between a locking position of locked engagement with the trigger for preventing the rearward movement thereof and an unlocked position of unlocked engagement with the trigger for permitting the rearward movement thereof upon occasion of the firing of the gun.

A lowermost portion 95 of the safety/ trigger/connector spring bears on the right hand side of the upper portion of the upper wall of the trigger guard 68.

A lowermost portion 97 lof the spring member bears on the left hand side of the upper portion of the upper wall of the trigger guard.

The front end 92 of the safety/ trigger/ connector spring constantly exerts a forward and upward pressure on the connector and holds the front end 73 of the connector against the underside of the action bars.

The invention is conceived as susceptible of various modifications without sacrifice of all of the advantages set out in the above statement of objects and without major alteration in the structural features hereof wherefore, accordingly, limitation of this invention should be made only as determined by a proper interpretation of the terms used in the subjoined claims.

The foregoing is intended to fully reveal the gist of this invention so that others can, by applying current knowledge, readily adapt it for various applications without omitting features which, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and therefore, such adaptations should be considered to comprehend and are intended to be comprehended within the meaning and range of equivalence of the claims annexed below.

What it is vdesired to claim and secure by Letters Patent of the United States is:

l. In a firearm including a stock, a receiver, a breech bolt reciprocable within the receiver and slide block reciprocable beneath the breech bolt with the breech bolt and slide block having complemental cam means for effecting unlocking and locking between the breech bolt and slide block in rearward and forward movements, the improvement in a tire control mechanism including, a spring-biased hammer having a tail portion and being pivotally mounted on the slide block and having a sear notch on a forward face thereof, a Sear having a tail portion and being pivotally mounted on the slide block and having a hammer point on a -rearward extremity of said hammer spring in the cocked position of said hammer, a trigger pivoted relative to ther receiver for swinging about an axis between normal and firing positions, a longitudinally movable connector having a rearward portion mating with said trigger and having a forward portion operatively related to the tail of said Sear for impelling said sear to hammer releasing position for effecting the fall of said hammer upon actuation rearwardly of said connector by the movement of said trigger to firing position, a spring means for biasing said connector upwardly and forwardly as said trigger assumes normal position and said sear assumes cocked position, a buier plate fixed to the stock rearwardly of said connector for camming said hammer against the tension of said hammer spring into cocked relationship with said sear on the rearward reciprocation of the slide block with the tail `of said hammer abutting said buffer plate and effecting rotation of said hammer on its pivotal connection with the slide block and for retarding the rearward travel of the slide block to a stop at the extreme limit of its rearward stroke.

2. In a firearm including a stock, a receiver, a breech bolt slidably receivable within the receiver, a slide block slidably mounted below the breech bolt and having a pair of action bars mounted thereon for complementary reciprocated movements therewith, an organization of coactive elements having a capacity for retarding the movement and partially absorbing the shock of stoppage of the reciprocating components during the portion of cyclic operation at the termination of the rearward stroke and for readying the components for the subsequent firing operation comprising, a buffer plate fixed to the stock, a trigger pendulantly mounted relative to the receiver, a'slidable connector operatively connected to said trigger for movement substantially in the axial direction of the breech bolt and slide block into and out of operating position, a sear pivotally mounted on the slide block, a hammer pivotally mounted on the slide block, said hammer and sear being releasably interconnected against the tension of said hammer spring in the cocked position of said hammer, said hammer having portions of its rearward face successively cammable against said buffer plate for rotating said hammer against the tension of said hammer spring into cocked relationship with said sear as the slide block is reciprocated rearwardly u nder progressively slowing conditions due to the progressively increasing tension of said hammer spring.

3. In an organization of coactive elements for retarding the rearward movement of the reciprocating coinponents in a firearm simultaneously with the cooking thereof in cooperative relationship with, a stock, a receiver, a breech bolt, a slide block, and a pair of action bars, with the breech bolt and slide block and action bars being supported for complementary reciprocal movements relative to the receiver between forward and retracted positions, the combination comprising, a hammer having a tail portion and being pivotally connected to the slide block, a hammer spring mounted on the slide block for biasing said hammer Vto firing position, a sear having a tail portion and being pivotally connectedto the slide block, said hammer and sear havingmating components for the releasable engagement of said' hammer against the tension of said hammer spring in the cocked position of said hammer, a trigger pendulantly mounted relative to said receiver for swinging about. an axis between ready-to-re and fired positions, aspringtensioned connector mounted on said trigger, said connector havingV a forwardly-disposed front. wall portion for actuating said sear into hammer releasing position as said connector is actuated rearwardly upon the rotation of said trigger to fired position, and a buier plate fixed to the stock for caming the tail of said hammer against the tension of said hammer spring and restoring the 9 cocked relationship of said hammer and sear as the breech bolt and slide block and action bars are actuated in their reciprocal movements relative to the receiver.

4. In a gun including a stock, a receiver and breech bolt respectively disposed within the receiver and a slide block engageable with t-he breech bolt for actuating the breech bolt between forward-locking and rearward-un locking movements relative to the receiver, an organization of coactive elements having a capacity for partially absorbing the shock of the stoppage of the reciprocating components during the portion of cyclic operation at the termination of the rearward stroke and for readying the components for the subsequent chambering -and discharge operations comprising, a buffer plate xed to the stock, a trigger pendulantly mounted relative to said receiver, a connector linked to said trigger and being reciprocable forwardly and rearwardly along the horizontal axis thereof, a pivotally suspended sear supported on the slide block, a pivotally suspended hammervsupported on the slide block, said connector being depressed downwardly by said hammer on the forward stroke ofV the slide block following the contact of said hammer with said buffer plate for actuation of said hammer into a full cock position, said hammer and sear having cooperating parts for holding said hammer in a full cock position preparatory to and during the forward movement of the slide block,

References Cited in the le of this patent 

